Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1979-07-02
1981-09-08
Whitehead, Harold D.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51119, 51122, 51123R, 511311, 51231, 51232, 51237R, 51237M, B24B 722, B24B 916
Patent
active
042876877
ABSTRACT:
This invention is that of a variable work holding device to be used for the grinding of various gemstones and industrial diamonds. The design and structure of the device provides that the device may be set up to operate in five different modes and provides that the gemstone may be rotated while in contact with a grinding surface or moved over the face of a grinding surface in a reciprocating motion, or a combination of both rotation and reciprocation which exposes the grain of the stone to the grinding surface from all angles automatically searching out the grain of the stone for optimum cutting efficiency and by continuously moving the stone across the face of the grinding surface, wear is evenly distributed on the grinding surface and grooving of the grinding surface is avoided. The structure comprises a rotatable head for holding the work object. The head is mounted on a slide. A timing belt pulley is mounted on the head and a second timing belt pulley is mounted on a motor shaft so that when a timing belt is connecting the two pulleys, motive power is provided to rotate the head. An off-center mounting hole is provided in the motor pulley to form an eccentric action for reciprocation of the head on the slide and linkage is provided to maintain a constant distance between the motor pulley and the head pulley. By removing the timing belt and moving the linkage to a different position, a semi-circular movement may be imparted to the work object.
REFERENCES:
patent: 677613 (1901-07-01), Armeny
patent: 902598 (1908-11-01), Ohanian
patent: 2391979 (1946-01-01), Kershaw
patent: 2527592 (1950-10-01), Spira
patent: 3110136 (1963-11-01), Spira
patent: 3624968 (1971-12-01), Leibowitz
patent: 4084352 (1978-04-01), Wheeler
IBM Technical Disclosure, vol. 14, No. 3, Aug. 1971.
Adolphson K. Bradford
Whitehead Harold D.
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